Illumination of exciton migration in rodlike luminescent conjugated polymers by single-molecule spectroscopy

被引:42
作者
Wang, CF
White, JD
Lim, TL
Hsu, JH
Yang, SC
Fann, WS
Peng, KY
Chen, SA
机构
[1] Acad Sinica, Inst Atom & Mol Sci, Taipei, Taiwan
[2] Multimedia Univ, Ctr High Speed & Broadband Networking, Cyberjaya, Malaysia
[3] Natl Taiwan Univ, Dept Phys, Taipei, Taiwan
[4] Tamkang Univ, Dept Phys, Taipei, Taiwan
[5] Natl Tsing Hwa Univ, Dept Chem Engn, Hsinchu, Taiwan
来源
PHYSICAL REVIEW B | 2003年 / 67卷 / 03期
关键词
D O I
10.1103/PhysRevB.67.035202
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Single-molecule spectroscopy is used to study the time-dependent spectral behavior of a short rodlike Poly(phenylene vinylene) (PPV) derivative polymer spin cast in a polystyrene matrix. The fluorescent time trace is characterized by stepwise intensity emission with constant spectral composition, punctuated by abrupt intensity changes, which are usually accompanied by abrupt spectral changes. In contrast to coiled long chain polymers, defect-free rodlike polymers exhibit multiple-emission sites, each with its characteristic invariant spectrum. The distribution of spectral jumps in the emission spectrum reflects the distribution of the effective conjugation length. This implies the energy transfer (i.e., thermalized exciton migration) along the polymer backbone is inefficient. A static disorder induced conjugation length distribution model with limited energy transfer can be used in understanding the photophysics of an isolated polymer.
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页数:8
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共 32 条
  • [1] Interchain vs. intrachain energy transfer in acceptor-capped conjugated polymers
    Beljonne, D
    Pourtois, G
    Silva, C
    Hennebicq, E
    Herz, LM
    Friend, RH
    Scholes, GD
    Setayesh, S
    Müllen, K
    Brédas, JL
    [J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2002, 99 (17) : 10982 - 10987
  • [3] Experimental and theoretical investigations of absorption and emission spectra of the light-emitting polymer MEH-PPV in solution
    Chang, R
    Hsu, JH
    Fann, WS
    Liang, KK
    Chiang, CH
    Hayashi, M
    Yu, J
    Lin, SH
    Chang, EC
    Chuang, KR
    Chen, SA
    [J]. CHEMICAL PHYSICS LETTERS, 2000, 317 (1-2) : 142 - 152
  • [4] Aggregated states of luminescent conjugated polymers in solutions
    Chang, R
    Hsu, JH
    Fann, WS
    Yu, J
    Lin, SH
    Lee, YZ
    Chen, SA
    [J]. CHEMICAL PHYSICS LETTERS, 2000, 317 (1-2) : 153 - 158
  • [5] Long-lived photoexcited states in polydiacetylenes with different molecular and supramolecular organization
    Comoretto, D
    Moggio, I
    Cuniberti, C
    Dellepiane, G
    Giardini, ME
    Borghesi, A
    [J]. PHYSICAL REVIEW B, 1997, 56 (16): : 10264 - 10270
  • [6] Cornil J, 1995, CHEM PHYS LETT, V247, P425, DOI 10.1016/S0009-2614(95)01224-9
  • [7] Photoluminescence spectra of oligo-paraphenylenevinylenes: a joint theoretical and experimental characterization
    Cornil, J
    Beljonne, D
    Heller, CM
    Campbell, IH
    Laurich, BK
    Smith, DL
    Bradley, DDC
    Mullen, K
    Bredas, JL
    [J]. CHEMICAL PHYSICS LETTERS, 1997, 278 (1-3) : 139 - 145
  • [8] Ultrafast spectroscopy of even-parity states in π-conjugated polymers
    Frolov, SV
    Bao, Z
    Wohlgenannt, M
    Vardeny, ZV
    [J]. PHYSICAL REVIEW LETTERS, 2000, 85 (10) : 2196 - 2199
  • [9] Cooperative and stimulated emission in poly(p-phenylene-vinylene) thin films and solutions
    Frolov, SV
    Vardeny, ZV
    Yoshino, K
    [J]. PHYSICAL REVIEW B, 1998, 57 (15): : 9141 - 9147
  • [10] Exciton dynamics in soluble poly(p-phenylene-vinylene): Towards an ultrafast excitonic switch
    Frolov, SV
    Liess, M
    Lane, PA
    Gellermann, W
    Vardeny, ZV
    Ozaki, M
    Yoshino, K
    [J]. PHYSICAL REVIEW LETTERS, 1997, 78 (22) : 4285 - 4288